Guest: Nuriye Sinem Berthier. With a rich background in chemistry, pharmacology, genetics, and biochemistry, and personal experience as a parent navigating autism, Sinem offers a unique lens on child development, neurodiversity, and the microbiome.

She introduces her Autism Cascade Hypothesis, highlighting how early-life environmental factors—including birth method, feeding choices, and gut health—may influence neurodevelopment and proposes a connection between diet, immune function, and brain development. It’s not a proven theory, but it’s an example of how science is trying to map complex biological pathways rather than single causes.

To further explain, imagine a row of dominoes: a certain milk protein gets broken down into a peptide, which might affect the gut and the brain’s protective barrier, leading to inflammation, and — in some individuals — changes in brain development. That’s the ‘cascade’ this idea is trying to describe. It’s still hypothetical — a chain of maybes, not certainties — but it’s fascinating because it tries to connect dots across biology, diet, and development.

Autism is multi-factorial — genetic, neurodevelopmental, sensory, and environmental factors all intertwine. The Cascade Hypothesis is one of several emerging models that explore how biology and development might interact, especially early in life.

Understanding biology doesn’t mean we’re trying to ‘fix’ autism — it means learning more about how diverse brains develop. Insights from models like this could improve support, reduce distress, and honor neurodivergent experiences.

This hypothesis is an early-stage idea — not clinical advice or a proven model. It’s a thought experiment that may guide future research. As always, any medical or dietary changes should be based on peer-reviewed science and professional guidance.

How do we balance curiosity about emerging science with respect for lived experience? We’d love to hear your thoughts — send us your reflections at [email protected]

Connect With Nuriye Sinem Berthier

LinkedIn: http://www.linkedin.com/in/sinem-berthier

Orcid Account: https://orcid.org/0009-0002-5840-7957

Journal Articles:

1. Proposing the Autism Cascade Hypothesis: A Novel Mechanistic Framework Linking Dietary Peptides, Neuroimmune Activation, and Developmental Timing. https://zenodo.org/records/17007271

2. Cascading Pathways in Autism: A New Clinical Lens on Early Pediatric Intervention. https://zenodo.org/records/17019400

Connect With Us

• Learn more about the Neurodiversity Voices Podcast: www.neurodiversityvoices.com

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Episode Chapters

• 00:00 – Podcast Introduction
• 02:05 – Meet Sinem Berthier
• 03:13 – Shifting Paths: From Pharma to Independent Research
• 05:07 – Understanding the Autism Cascade Hypothesis
• 09:17 – Practical Steps for Families
• 10:21 – Common Misconceptions About Autism
• 11:05 – Bridging Science & Everyday Families
• 11:36 – Creating Le Fermentis
• 13:12 – Community & Cultural Awareness
• 14:20 – Empowering Parents
• 15:16 – Looking Ahead in Research
• 16:02 – Legacy & Impact
• 16:38 – Conclusion and Reflections

Disclaimer:

Information from this podcast is provided for general educational information purposes only. It does not constitute medical advice and is not intended to be a substitute for advice given by your physician or other qualified health care professional. Always seek the advice of your physician or other qualified health care professional with any questions you may have. Never disregard medical advice or delay seeking medical advice because of something in this podcast. Information contained in this podcast or any websites to which a link is provided should be used only under the supervision of an appropriately qualified physician. Please consult with your physician before making any decision regarding treatment and /or medication. If you think you may be experiencing a medical emergency, call your doctor or dial 911 immediately. Reliance on any information in this podcast is solely at your risk.